JP2001271247A - Base fabric for air bag and air bag - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain both a base fabric for an air bag excellent in heat resistance when the bag is developed while retaining mechanical characteristics as the air bag without causing slippage of sewn parts of the bag and the air bag. SOLUTION: This base fabric for the air bag is characterized in that a silicone resin in an amount of 0.01-0.2 g/m2 is applied to a woven fabric having >=2,100 cover factor and the flame retardance defined by the Federal Motor Vehicle Safety Standards (FMVSS)-302 (horizontal method) in the base fabric for the air bag comprising a synthetic fiber woven fabric. The air bag is characterized as comprising the base fabric for the air bag.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an airbag for absorbing and protecting the impact of an occupant during a vehicle collision, and more particularly, to an airbag which is flexible and excellent in bag storage, flame retardancy and heat resistance. TECHNICAL FIELD The present invention relates to an airbag base fabric and an airbag having a property.

[0002]

2. Description of the Related Art Conventionally, 300 to 1000 airbags have been used.
An elastomer resin such as synthetic rubber such as chloroprene, chlorosulfonated olefin, or silicone is applied to a plain fabric using denier nylon 66 or nylon 6 filament yarn to improve heat resistance, flame retardancy, air barrier properties, etc. Then, the laminated base cloth was cut and sewn into a bag. However, when applying and laminating these elastomer resins, a coating method such as knife coating, roll coating, and reverse coating is generally employed. In the case of the chloroprene elastomer resin, 90 to 120 g / m ^{2 is} applied to the surface of the base fabric, so that there is a problem that the thickness is increased and the package volume is increased also in terms of storability. In the case of the silicone elastomer resin, which is more excellent in heat resistance and cold resistance than the chloroprene elastomer resin, the application amount is 40 to 60 g / m ² , while the weight is reduced and the storage property is considerably improved, but it is sufficiently satisfactory. There is also a problem that it is difficult to fold when the bag is folded and stored in a package, not at an acceptable level. In order to solve such a problem, for example, Japanese Patent Application Laid-Open No. Hei 5-319194 discloses a method in which a filament cloth is impregnated with a silicone resin diluent, and a silicone resin is applied at a rate of 5 to 80 g / m ^2, so that the storability is improved. But it was not satisfactory.

[0003] In recent years, in order to solve such problems, attention has been paid to an airbag using a non-coated base fabric formed by high-density weaving. As a corresponding technique, a high-density non-coated airbag made of a polyamide fiber woven fabric such as nylon 66 or nylon 6 and a polyester fiber woven fabric is being studied. For example, Patent No. 2
Japanese Unexamined Patent Publication No. 950954 discloses a low-permeability uncoated woven fabric excellent in storability and having a total fineness of 30 as a preferable yarn use.
The use of 0-400 dtex yarn is disclosed.
Although the airbag base fabric obtained by this proposal has a considerably improved storability, the heat resistance at the time of deploying the bag is insufficient, and it is difficult to say that the mechanical characteristics are sufficient.

[0004]

SUMMARY OF THE INVENTION In view of the drawbacks of the conventional airbag, the present invention has excellent heat resistance when the bag is deployed while maintaining the mechanical characteristics of the airbag. An object of the present invention is to provide an airbag base fabric and an airbag which are excellent in bag storage properties and have flame retardancy without occurrence of displacement.

[0005]

The present invention adopts the following means to solve the above-mentioned problems.
That is, in the airbag base fabric of the present invention, in the airbag base fabric made of a synthetic fiber woven fabric, the series component resin has a solid content of 0.01 to 0.2 g / m ² in a woven fabric having a cover factor of 2100 or more. Attached and F
It is characterized by satisfying the flame retardancy specified in MVSS-302 (horizontal method), and the airbag of the present invention is characterized by comprising such an airbag base fabric. is there.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention relates to a synthetic resin fabric having a cover factor of 2100 or more as a base fabric for an airbag, wherein a silicone resin is adhered in a solid content of 0.01 to 0.2 g / m ² , and FMVSS -302 (horizontal method).
Without this, the present invention cannot be achieved.

The synthetic fiber fabrics of the present invention include nylon 6.6, nylon 6, nylon 12, nylon 4
Copolymerization of nylon 6 and nylon 6 with nylon 6.6, polyamide fiber prepared by copolymerizing nylon 6 with polyalkylene glycol, dicarboxylic acid or amine, homopolyester such as polyethylene terephthalate, polybutylene terephthalate, and polyester repeating unit Fiber, copolymerized with aliphatic dicarboxylic acid such as isophthalic acid, 5-sodium sulfoisophthalic acid or adipic acid, aramid fiber represented by copolymerization with paraphenylene terephthalamide and aromatic ether, rayon Fiber, polysulfone fiber,
A woven fabric composed of ultrahigh molecular weight polyethylene fibers and polymer array fibers having a sea-island structure mainly composed of the above synthetic fibers is used. Among these woven fabrics, polyamide fibers and polyethylene terephthalate fibers are preferable, and nylon 66 and nylon 6 are more preferable in terms of impact resistance. Such fibers may contain various additives that are commonly used for improving productivity or characteristics in the production or processing steps of the raw yarn. For example, a heat stabilizer, an antioxidant, a light stabilizer, a leveling agent, an antistatic agent, a plasticizer, a thickener, a pigment, a flame retardant and the like can be contained.

[0008] The structure of the woven fabric, plain weave, twill weave,
Satin weaves and their modified weaves, multiaxial weaves, and the like are used. Among them, plain weaves are particularly preferred because of their excellent mechanical properties and storability. As a loom used in the weaving process, a water jet room, an air jet room, a rapier room, and the like are used.

The cover factor of the woven fabric is 2100
That is essential. The cover factor is defined as the total fineness of the warp constituting the woven fabric is D1 (dtex), the weaving density is N1 (book / 2.54 cm), and the total fineness of the weft is D2.
(Dtex), assuming that the weaving density is N2 (line / 2.54 cm), (D1 × 0.9) ^1/2 × N1 + (D2 × 0.9)
It is represented by ^1/2 × N2. If the cover factor is smaller than 2100, the fabric becomes flexible, which is preferable in terms of bag storage. However, there is a problem that the air permeability of the base fabric increases and the deployment speed of the bag decreases. In addition, since the degree of freedom of the weaving structure is increased, misalignment of the sewn portion of the bag is likely to occur. As a result, when the bag is deployed, gas is released from the gap between the woven fabric and the sewing thread due to misalignment of the sewn portion of the bag, causing a problem that the internal pressure of the bag does not increase. Also, if the sewn portion is misaligned when the bag is deployed, the gas required to deploy the bag is hot, so if the gas hits the misaligned portion, the sewing thread is burned off and the bag may burst. There is. Therefore, the cover factor must be 2100 or more in order to prevent the bag from being unfolded, especially the bag sewing portion.

However, if the cover factor is 2100 or more, the flexibility of the woven fabric is impaired, so that it is essential to attach a silicone resin to the woven fabric. By applying the resin to the woven fabric, the friction between the yarns constituting the woven fabric can be reduced, the woven fabric becomes flexible, and the bag storability is improved. In addition, since the silicone resin has heat resistance, the resin covers the surface of the fabric, so that the fabric also plays a role of protecting the fabric from high-temperature gas when the bag is deployed. As the silicone resin, known resins can be used, and there is no particular limitation. In particular, amino-modified silicone, epoxy-modified silicone, carboxy-modified silicone, dimethyl silicone, and methyl hydrogen silicone are effective.

The amount of the resin adhered is 0.01% in solid content.
Up to 0.2 g / m ² , FMVSS-302 (horizontal method)
It is indispensable to satisfy the flame retardancy specified in (1). If the amount is less than 0.01 g / m ² , the friction between yarns cannot be reduced, the woven fabric will not be flexible, and the bag storability will not be improved. On the other hand, when the amount is more than 0.2 g / m ² , although the bag storage ability is improved, the FMVSS-302 is not suitable in terms of flame retardancy.
In addition, the flame retardancy specified in (horizontal method) cannot be satisfied, and the degree of freedom of the weave structure becomes too large, resulting in misalignment of the sewn portion of the bag.

On the other hand, as a method of applying the silicone resin, a usual impregnation treatment, for example, a device including a dipping tank and a mangle or vacuum for uniform impregnation, a spray device, a forming device,
It is preferable to apply a coating device or the like, but there is no particular limitation. When a spray, a forming device, or a coating device is applied, it may be applied to one side or both sides of the fabric. As the heat treatment, after applying the synthetic resin, a heat treatment at 50 to 200C is preferable, and a heat treatment at 100 to 180C is more preferable. If necessary, a two-step process, for example, a heat treatment at 80 ° C., followed by a heat treatment at 150 ° C. The application of the synthetic resin to the woven fabric can be performed after any of the greige, the scouring, the drying, and the heat setting.

The total fineness of the yarn constituting the base fabric for an airbag is preferably from 100 to 700 dtex in order to satisfy the mechanical properties required for the airbag. Further, it is more preferably from 300 to 600 dtex, but it is most preferably from 400 to 500 dtex in consideration of the mechanical properties and the heat resistance of the woven fabric required at the time of bag development.

The fibers constituting the woven yarn of the base fabric for an airbag preferably have a single fiber fineness of 1 to 6.5 dtex. When the single fiber fineness is larger than 6.5 dtex, the woven fabric becomes coarse and hard. On the other hand, when the single fiber fineness is smaller than 1 dtex, fluff is liable to be generated during weaving of the woven fabric, which causes a problem in weavability. More preferably, 1.5 to 4.5 dte
As for x, 2 to 3.3 dtex is the best as a whole in view of the flexibility and weavability of the woven fabric.

[0015] The base fabric for the airbag is JIS L
It is preferable in terms of bag expandability that the air permeability measured by the method specified in the method 1096 A is 0.2 ml / cm ² / sec or less. The air permeability is 0.2 ml / cm ² /
If it is longer than sec, the gas leaks from the base fabric constituting the airbag when the airbag is deployed, and the deployment time is prolonged. If the gas comes into contact with the face, the gas is hot and the occupant may be burned. There is.

There are no particular restrictions on the characteristics of the base fabric for an airbag as long as it satisfies the mechanical properties required for an airbag.
As described above, the elongation at break is preferably 15% or more, and the tear strength is preferably 100 N or more.

An airbag using such an airbag base fabric can be used for a driver's seat airbag, a passenger's seat airbag, a rear seat airbag, a side airbag, and the like.

The features of the airbag of the present invention are excellent in heat resistance at the time of bag deployment while maintaining mechanical characteristics, and excellent in bag storage ability without causing misalignment of a sewn portion of the bag. It has flammability.

[0019]

Next, the present invention will be described in more detail by way of examples.

Various evaluations in the examples were performed according to the following methods.

Weight (weight): JIS L 1096
(Method 6.4.2).

Thickness: JIS L 1096 (6.5 method)
Determined by

Tensile strength: JIS L 1096 (6.1
2.1A method), and indicated by average values in the longitude and latitude directions.

Elongation at break: JIS L 1096 (6.1
2.1A method), and indicated by average values in the longitude and latitude directions.

Tear strength: JIS L 1096 (6.1
5.2A-2 method), and indicated by average values in the longitude and latitude directions.

Air permeability: JIS L 1096 (6.2
7.1A method).

Flame retardancy: Evaluated according to FMVSS-302. Specifically, in a horizontal combustion test using an MVSS-2 type combustion tester manufactured by Suga Test Instruments, in the case of extinguishing by the marked line 1 indicated by 2 in FIG.
Medium, it starts burning beyond mark 1, and if it extinguishes to mark 2 indicated by 3 within 60 seconds, it is considered to be flame retardant. FIG.
In the case where the fuel burns over the marked line 2 during the middle, the burning speed (mm / min) is calculated from the burning time from the marked line 1 and the burning distance. The measurement was performed on 10 samples each having the warp direction of the woven fabric taken in the length direction of the sample piece and 10 samples having the weft direction of the woven fabric taken in the length direction of the sample piece. Flammability or burning speed 10
A case of 0 mm / min or less was regarded as a pass.

Bag storage test: An airbag having a capacity of 60 L was folded into bellows four times each from the left and right so as to become 150 × 150 mm as shown in FIG. 2, and then folded four times into bellows from above and below. As shown in FIG. 3, a load of 4000 g was applied to the bag, the thickness of the bag at that time was measured, and the thickness of the 350 dtex non-coated base fabric was set to 10
The relative ratio when it was set to 0 was determined.

Bag deployment test: 60 L air bag
Deployment test using an electric ignition type inflator,
Misalignment of bag sewing part and bag inflation
The state of damage to the fabric around the port was examined. Example 1 Total fineness is 470 dtex, 144 filaments, strength is
8.4 cN / dtex, elongation of 23.5%
Using filament yarn consisting of Ron 6.6 fibers,
The warp and weft density of 53 yarns in the target jet room
A 2.54 cm plain weave was obtained. Then, one side of the fabric is
Mino-modified silicone emulsion (solid content 35%)
0.5% by weight, 1.5% by weight of nonionic foaming agent
Adjust the rotor with a resin foam diluent with a foaming ratio of 10 times.
Coating with a rescreening device, 2 at 130 ° C
Heat treatment for 0.1 min.
m ^TwoAn attached airbag base fabric was obtained.

Thereafter, the diameter of the airbag fabric was reduced to 7 mm.
Two 25 mm circular cloths are cut by a punching method, and three circular reinforcing cloths of 200 mm in diameter made of the same cloth are laminated at the center of one circular cloth.
The sewing machine was sewn on the 175 mm and 175 mm lines with a sewing thread composed of 420 D / 1 × 3 nylon 6.6 fibers for both upper and lower threads, and a hole having a diameter of 90 mm was provided as an inflator attachment port. Opposite to the center at a position of 255 mm in the bias direction, the diameter of the base cloth is 75
1mm circular reinforcing cloth with 50mm diameter, 60mm
420D / 1 nylon 6.6 fiber for both upper and lower yarns
The sewing machine is sewn with lockstitch with sewing thread composed of × 3,
Two vent holes each having a hole having a diameter of 40 mm were provided. Next, the reinforcing cloth side of the present circular cloth was turned outside, and the other circular cloth was overlapped with the longitudinal axis shifted by 45 ° to obtain a diameter of 70%.
On both 0mm and 710mm circumference, nylon 6
The sewing machine was sewn by double chain stitching with a sewing thread composed of 1260D / 1 of 6 fibers, and then the bag body was turned over to produce an airbag having a capacity of 60L. In addition, a bag was prepared so that the surface to which the silicone resin was attached was located inside the bag.

Table 1 shows the characteristics of the airbag fabric thus obtained. The airbag fabric of the present invention has low air permeability and flame retardancy, is excellent in bag storage properties, has no misalignment when the bag is deployed, and has little damage to the bag around the inflator mounting opening due to heat. Was.

[0032]

[Table 1]

Comparative Example 1 The same woven fabric as in Example 1 was directly used as an airbag base fabric without coating. Next, an airbag having a capacity of 60 L was produced in the same manner as in Example 1 using the base fabric for an airbag.

Table 1 also shows the characteristics of the airbag fabric thus obtained. The airbag fabric of Comparative Example 1 had an insufficient bag-storing property, and the bag around the inflator attachment opening was significantly damaged by heat. Comparative Example 2 Resin foam dilution prepared by adjusting the amino-modified silicone emulsion to 1.5% by weight of solid content and 1.5% by weight of nonionic foaming agent on one side of the same woven fabric as in Example 1 to make the foaming ratio 10 times. The solution was coated on a rotary screen device and heat treated at 130 ° C. for 2 minutes to obtain a base fabric for an airbag to which the silicone resin was adhered at a solid content of 0.3 g / m ² . Next, an airbag having a capacity of 60 L was produced in the same manner as in Example 1 using the base fabric for an airbag.

The characteristics of the airbag fabric thus obtained are also shown in Table 1. The airbag fabric of Comparative Example 2 could not satisfy the flame retardancy, and misalignment occurred when the bag was deployed. Comparative Example 3 Using the same yarn as in Example 1, a plain weave having a warp and weft density of 50 yarns / 2.54 cm was obtained in a water jet loom. Then, the woven fabric was treated in the same manner as in Example 1 to obtain an amino-modified silicone emulsion at a solid content of 0.1 g / m ^2.
An attached airbag base fabric was obtained. Next, an airbag having a capacity of 60 L was produced in the same manner as in Example 1 using the base fabric for an airbag.

The properties of the airbag fabric thus obtained are also shown in Table 1. In the airbag fabric of Comparative Example 3, misalignment occurred when the bag was deployed. Example 2 A filament yarn composed of nylon 6.6 fiber having a total fineness of 470 dtex, 192 filaments, a strength of 8.4 cN / dtex and an elongation of 23.0% was used. 55 / 2.5
A plain woven fabric having a weft density of 4 cm and a weft density of 50 yarns / 2.54 cm was obtained. Next, on one side of the woven fabric, an epoxy-modified silicone emulsion (solid content: 40%) was adjusted to 0.4% by weight of solid content and 1.5% by weight of a nonionic foaming agent, and a resin foam diluting liquid having an expansion ratio of 10 times was used. And a heat treatment at 130 ° C. for 2 minutes to obtain a base fabric for an airbag to which the solid content of the silicone resin is 0.08 g / m ² . Next, an airbag having a capacity of 60 L was produced in the same manner as in Example 1 using the airbag base fabric.

Table 2 shows the properties of the airbag fabric thus obtained. The airbag fabric of the present invention has low air permeability and flame retardancy, is excellent in bag storage properties, has no misalignment when the bag is deployed, and has little damage to the bag around the inflator mounting opening due to heat. Was.

[0038]

[Table 2]

Comparative Example 4 On one side of the same woven fabric as in Example 2, an epoxy-modified silicone emulsion was adjusted to a solid content of 0.04% by weight and a nonionic foaming agent to 1.5% by weight, and the expansion ratio was set to 10 times. It was coated with a resin foam diluent by a rotary screen device and heat-treated at 130 ° C. for 2 minutes to obtain a base fabric for an airbag to which the silicone resin had a solid content of 0.008 g / m ² adhered. Next, Example 1 was performed using the airbag base fabric.
An airbag having a capacity of 60 L was produced in the same manner as in the above.

The properties of the airbag fabric thus obtained are also shown in Table 2. The airbag fabric of Comparative Example 4 had an insufficient bag-storing surface, and the bag around the inflator attachment opening was significantly damaged by heat. Comparative Example 5 Epoxy-modified silicone emulsion was adjusted to 2.0% by weight of solid content and 1.5% by weight of nonionic foaming agent on one side of the same woven fabric as in Example 2, and the resin foam dilution was adjusted to an expansion ratio of 10 times. The solution was coated on a rotary screen device and heat-treated at 130 ° C. for 2 minutes to obtain an airbag base fabric to which the solid content of the silicone resin was 0.4 g / m ² . Next, an airbag having a capacity of 60 L was produced in the same manner as in Example 1 using the base fabric for an airbag.

The characteristics of the airbag fabric thus obtained are also shown in Table 2. The airbag fabric of Comparative Example 5 was not able to satisfy the flame retardancy, and misalignment occurred when the bag was deployed. Example 3 A filament yarn composed of nylon 6.6 fiber having a total fineness of 350 dtex, 96 filaments, a strength of 8.4 cN / dtex and an elongation of 22.5% was used, and the weaving density of the warp and the weft in a rapier room. 63 / inch plain weave was obtained. Then, on one side of the woven fabric, a resin foam was prepared by adjusting a methyl hydrogen silicone emulsion (solid content: 40%) to 1.0% by weight of solid content and 1.5% by weight of a nonionic foaming agent to obtain a foaming ratio of 10 times. The mixture was coated with a diluent on a rotary screen device and heat-treated at 150 ° C. for 2 minutes, and the silicone resin was solidified at 0.2 g / m ^2.
An attached airbag base fabric was obtained. Next, an airbag having a capacity of 60 L was produced in the same manner as in Example 1 using the airbag base fabric.

Table 3 shows the characteristics of the airbag fabric thus obtained. The airbag fabric of the present invention has low air permeability and flame retardancy, is excellent in bag storage properties, has no misalignment when the bag is deployed, and has little damage to the bag around the inflator mounting opening due to heat. Was.

[0043]

[Table 3]

Comparative Example 6 The same fabric as in Example 3 was used as an airbag base fabric without coating. Next, an airbag having a capacity of 60 L was produced in the same manner as in Example 1 using the base fabric for an airbag.

The properties of the airbag fabric thus obtained are also shown in Table 3. The airbag base fabric of Comparative Example 6 had an insufficient bag-storing surface, and the bag around the inflator attachment opening was greatly damaged by heat. Comparative Example 7 Resin foaming on one side of the same woven fabric as in Example 3 in which methyl hydrogen silicone emulsion was adjusted to 2.5% by weight of solid content and 1.5% by weight of nonionic foaming agent, and the expansion ratio was 10 times. It was coated with a diluent on a rotary screen device, and heat-treated at 130 ° C. for 2 minutes to obtain a base fabric for an airbag to which the silicone resin had a solid content of 0.5 g / m ² . Next, an airbag having a capacity of 60 L was produced in the same manner as in Example 1 using the base fabric for an airbag.

The characteristics of the airbag fabric thus obtained are also shown in Table 3. The airbag fabric of Comparative Example 7 was not able to satisfy the flame retardancy, and misalignment occurred when the bag was deployed. Comparative Example 8 Using the same yarn as in Example 3, a plain woven fabric having a warp and weft weave density of 58 yarns / inch was obtained in a rapier room, and was directly used as a base fabric for an airbag. Next, an airbag having a capacity of 60 L was produced in the same manner as in Example 1 using the base fabric for an airbag.

The characteristics of the airbag fabric thus obtained are also shown in Table 3. In the airbag fabric of Comparative Example 8, misalignment occurred when the bag was deployed, and the bag near the inflator attachment opening was significantly damaged by heat. Example 4 Using a filament yarn composed of nylon 6.6 fiber having a total fineness of 285 dtex, 96 filaments, a strength of 8.6 cN / dtex and an elongation of 22.5%, weaving a warp and a weft in an air jet loom A plain weave with a density of 70 yarns / inch was obtained. Next, the woven fabric was impregnated with a resin diluent prepared by adjusting a dimethyl silicone emulsion (solid content: 45%) to a solid content of 0.17%, and then squeezed with a mangle.
The resin was heat-treated at 150 ° C. for 2 minutes, and the resin was solidified at 0.1%.
An airbag base fabric to which 1 g / m ^{2 was} adhered was obtained.

The properties of the airbag fabric thus obtained are shown in Table 3. The airbag fabric of the present invention has low air permeability and flame retardancy, is excellent in bag storage properties, has no misalignment when the bag is deployed, and has little damage to the bag around the inflator mounting opening due to heat. Was. Comparative Example 9 The same woven fabric as in Example 4 was directly used as an airbag base fabric without coating. Next, an airbag having a capacity of 60 L was produced in the same manner as in Example 1 using the base fabric for an airbag.

The characteristics of the airbag fabric thus obtained are shown in Table 3. The airbag fabric of Comparative Example 9 had insufficient bag-storability, and the bag around the inflator attachment opening was significantly damaged by heat. Example 5 Using a filament yarn composed of nylon 6.6 fiber having a total fineness of 235 dtex, 72 filaments, a strength of 8.6 cN / dtex and an elongation of 23.5%, weaving a warp and a weft in a water jet room The density is 76 /
An inch plain fabric was obtained. Next, the fabric is impregnated with a resin diluent prepared by adjusting an amino-modified silicone emulsion (solid content: 35%) to a solid content of 0.35%, squeezed with a mangle, and heat-treated at 150 ° C. for 2 minutes. Was adhered at a solid content of 0.2 g / m ² to obtain an airbag base fabric.

Table 4 shows the characteristics of the airbag fabric thus obtained. The airbag fabric of the present invention has low air permeability and flame retardancy, is excellent in bag storage properties, has no misalignment when the bag is deployed, and has little damage to the bag around the inflator mounting opening due to heat. Was.

[0051]

[Table 4]

Comparative Example 10 The same woven fabric as in Example 5 was directly used as an airbag base fabric without coating. Next, an airbag having a capacity of 60 L was produced in the same manner as in Example 1 using the base fabric for an airbag.

The properties of the airbag fabric thus obtained are also shown in Table 4. The airbag fabric of Comparative Example 10 had an insufficient bag-storing surface, and the bag around the inflator attachment opening was significantly damaged by heat.

[0054]

According to the present invention, while maintaining the mechanical properties of an airbag, it has excellent heat resistance when the bag is deployed,
In addition, it is possible to provide an airbag having excellent bag storage properties and flame retardancy without causing misalignment of the bag sewing portion, and it is possible to promote the spread of an occupant protection system using the airbag. .

[Brief description of the drawings]

FIG. 1 is an explanatory diagram showing a measurement method of FMVSS-302 (horizontal method).

FIG. 2 is an explanatory view showing a method of folding an airbag in a storage test.

FIG. 3 is an explanatory diagram showing a method of measuring a bag thickness when a load is applied to an airbag during a storage test.

[Explanation of symbols]

 1: Base cloth 2: Mark line 1: 3: Mark line 2: 4: Plan view of 60L capacity airbag 5: Folding direction 6: Plan view of airbag folded from left and right 7: Plan view of airbag folded from top and bottom 8 : Side view of airbag folded from top and bottom, left and right 9: Load 10: Thickness of airbag when load is applied

 ──────────────────────────────────────────────────続 き Continued on the front page F-term (reference)

Claims (11)

[Claims] An airbag base fabric comprising a synthetic fiber woven fabric, wherein the woven fabric having a cover factor of 2100 or more has a series resin of 0.01 to 0.2 g / m2 in solid content.
⁽² ) An airbag base fabric, which is adhered and satisfies the flame retardancy specified in FMVSS-302 (horizontal method). 2. The method according to claim 1, wherein the silicone resin is at least one selected from the group consisting of amino-modified silicone, epoxy-modified silicone, carboxy-modified silicone, dimethyl silicone and methyl hydrogen silicone. Base fabric for airbags. 3. The synthetic fiber woven fabric has a total fineness of 100 to 700.
The base fabric for an airbag according to claim 1, wherein the base fabric is made of a dtex yarn. 4. The synthetic fiber woven fabric has a total fineness of 300 to 600.
4. The airbag fabric according to claim 3, wherein the fabric is made of dtex yarn. 5. The synthetic fiber woven fabric has a total fineness of 400 to 500.
The airbag fabric according to claim 4, wherein the fabric is made of dtex yarn. 6. The synthetic fiber woven fabric has a single fiber fineness of 1 to 6.5.
The airbag fabric according to any one of claims 1 to 5, wherein the fabric is made of dtex fibers. 7. The synthetic fiber woven fabric has a single fiber fineness of 1.5 to 1.5.
The base fabric for an airbag according to claim 6, wherein the base fabric is made of 4.5 dtex fiber. 8. The synthetic fiber woven fabric has a single fiber fineness of 2 to 3.3.
The base fabric for an airbag according to claim 7, wherein the base fabric is made of dtex fiber. 9. The synthetic fiber fabric according to JIS L 1096
The air permeability measured by the method specified in Method A is 0.2 ml
/ Cm ² / sec or less.
The base fabric for an airbag according to any one of claims 1 to 8. 10. The synthetic fiber woven fabric has a tensile strength of 500 N /
cm or more, elongation at break of 15% or more, tear strength 100N
The base fabric for an airbag according to any one of claims 1 to 9, which is as described above. 11. An airbag comprising the airbag base fabric according to any one of claims 1 to 10.